<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=s, initial-scale=1.0">
    <title>Document</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <div id='root'>

        今天天气很{{info}} <br>
        <button @click='showInfo'>切换天气</button>
    </div>
    <script text="javascript">
        Vue.config.productionTip = false
        new Vue({
            el:'#root',
            data:{
                isHot:true
            },
            computed:{
                info(){
                    return this.isHot ? '炎热' : '凉爽'
                }
            },
            methods: {
                showInfo(){
                    this.isHot = !this.isHot
                }
            },
        })

    </script>
</body>
</html>